HISC is the interface that connected the main Soc processor ( Also called Applciation Processor AP) to the modem ( 3G or 4G if there are two modems separately )

HSIC is uses the standard USB core library. And it is standard given by usb.org. The HSIC by itself consumes very less power and is one of the very power efficient and space efficient ways of interconnecting chips. Currently common to Qualcomm and Sammy Exynos architectures.

The reason seeing too many HSIC wake lock and other wake ups is due to the fact that the HSIC interface is waken up by modem (resulting modem scenarios are also so many) .

Also one important reason is EFS sync.
A concept : that the new modem architectures doesn't support a flash storage.(Saves lot of cost to manufacturer) .So every time modem needs to store something , it wakes up hisc interface and ask the AP (Main processor) to store it for him in his flash.

So this CP storing via AP is a fairy frequent activity even during suspend/deep sleep mode. Remember modem is periodically awake to do "Cell Update message" all the time.

I see the concern over this L2_hsic wake lock. I can say at this point that it is quite natural activity. and a necessary evil for smooth working of your modem( network 2g,3g,4g ) subsystem.

Every company including Sammy have some kind of power optimization done in the HSIC. So they taking care of this we considering fairy high battery drainer issue. .

If it is too high, modem/network can be blamed , if too many frequent network ( too many cell re-selection activity due to low RF reception) changes force the modem to do more activity, thus waking AP to do the work of storing its data over HSIC.

• Added Modes to WiFi and Bluetooth Toggles (With or without dialog)
• Toggles Section Fixes for sorting, and many improvements
• 2G/3G/Auto Toggle added
• Ability to change colors of Toggles (Label, On, Off, Background)
• Power Toggle Recode, removing that stupid dialog I created
• Signal (Wifi and Network) AOSP Layout by default with Samsung green as connected color
• Ability to change Signal Indicators Colors
• Notification Panel Transparency (experimental)
• No restart required when changing statusbar color/transparency
• No restart required when changing statusbar transparency on ripple
• Custom Battery Overhaul, read battery section in the second post for instructions on how to create batteries. The batteries you make now can also be uploaded to the Play Store, and people can download them, install, and choose the custom battery they like.
• Random Lockscreen Ink Color on each wakeup
• AOSP Clear and Settings Buttons in the notification panel
• Brightness Bar color change
• Toggle IME Switcher notification and icon
• Show/Hide StatusBar on Lockscreen
• SPenBoard Shortcut added to Simplistic Control
• Toggle Ongoing and Notifications label in the notifications panel (toggle them off for an AOSP look)
• TW Launcher page loop option added (Credits to my buddy mirko)
• TW Launcher rotation option added (Credits to my buddy mirko)
• PIN Quick Unlock option, enabling this will remove the need of the OK button from the Pin Unlock, to make unlocking faster. (credits to CM)
• My own FM Radio and Music Controls for Ripple and Circle Lockscreen (Music works for stock and google music)
• Full date can now be added to the clock view in the statusbar
• QuickLaunch bar under the toggles and brightness bar, allowing you to launch apps or perform actions (Lock, Power, Collapse, Recents) directly from the statusbar, supports up to 12 shortcuts.
• CRT-OFF (Credits to AOSP Android for code, sorg for workaround) Added
• Hardware Buttons Section added, allowing you to choose actions or launch an app for:
- Back LongPress
- Menu LongPress (some apps can consume this, and conflicts may happen)
- Home DoubleClick

Actions included are: Global Search, Launch Assistant (S-Voice, Google Now), Kill Current Process, Show/Hide Multiwindow

Section also includes an option for controlling the delays of Home Double Click, and Home LongPress (Recents panel).
• MW Toggle is reverted back to its default functionality.